OBJECTIVESThe purpose of this study was to assess the incremental value of preoperative breast MRI over mammography and US in depicting the accurate extent of disease in invasive duct carcinoma (IDC) ...compared to invasive lobular carcinoma (ILC). PATIENTS AND METHODSRetrospective analysis of pre-operative mammography, US and MRI was performed in 239 patients with either IDC (n = 193) or ILC (n = 46). Images were evaluated for solitary, multifocal or multi centric disease and compared for concordance with postsurgical pathology. Discordance was documented as either overestimation or underestimation. Two tailed paired T and Fischer's exact tests were used for analysis. RESULTSMultifocality was present on pathology in 35% and 61% of patients with IDC and ILC (P < .05) and multicentricity in 23% and 41% respectively (P = .84). In ILC, MRI demonstrated better concordance with pathology compared to mammography and US (89%, 44%, 49% for multifocality P < .05 and 80.5%, 63%, 71% for multicentricity P = .3). For IDC, concordance with pathology for all modalities was similar (65%-76%). Among discordant cases, underestimation was significantly more common for mammography and US, while MRI more frequently overestimated disease extent. MRI very rarely overestimated multifocal disease in ILC (2%). CONCLUSIONMRI demonstrates an 80% to 90% concordance rate with pathology for ILC, superior to mammography and US. The addition of MRI in IDC patients may decrease underestimation of disease extent and potentially contribute to a reduction in post-operative residual disease.
American College of Radiology and Society of Breast Imaging guidelines call for routine breast MRI screening only for women with the highest risk profiles for development of breast cancer, suggesting ...that screening of women at lower risk might result in an increased frequency of false-positive biopsy results. The purpose of this study was to test this assumption by comparing MRI-guided biopsy outcomes of lesions detected at MRI screening of women with a personal history of breast cancer with outcomes among women with genetic or familial high risk.
Outcomes of 130 MRI-guided biopsies were analyzed. One group consisted of women with hereditary (genetic or familial) risk, and the other group consisted of women with a personal history of breast cancer. Biopsies were performed with a 9-gauge vacuum-assisted device or surgically after MRI localization.
Of 130 MRI-guided biopsies, 20 (15%) yielded malignant histologic findings, 14 (11%) yielded high-risk lesions, and 96 (74%) had benign findings. There was a slightly higher malignancy rate for the personal-risk group (19%) compared with the hereditary-risk group (13.5%). There also was a slightly higher combined rate of malignancy and high-risk lesions (34% vs 22%) with no statistically significant difference (p < 0.25, p < 0.12). Patients in the hereditary-risk group were younger (44 ± 1.2 vs 54 ± 1.7 years; p < 0.001) than those in the personal-risk group.
Our preliminary data show no difference between the two risk groups with respect to probability of an MRI-guided biopsy result of malignancy, calling into question the proposed assumption. Further prospective studies of the role of MRI screening combined with MRI-guided biopsy when required for patients with previously treated localized breast cancer may be indicated.
Abstract Objectives To compare the underestimation of ductal carcinoma in situ (DCIS) vs DCIS with “possible invasion” at breast biopsy and to determine if any factors related to clinical indication, ...imaging abnormality, biopsy, or DCIS-grade affected the likelihood of underestimation. Methods Of 3836 consecutive lesions that were biopsied by using a 14-gauge needle, 117 lesions revealed DCIS. Surgical pathology results of invasive carcinoma were compared with needle biopsy results of DCIS or DCIS with possible invasion. Clinical indication, imaging abnormality, biopsy guidance modality, sample number, and histologic grade were recorded. Yates corrected χ2 and Fisher exact tests were used to determine differences between groups. Results A total of 101 lesions were DCIS and 16 were DCIS with possible invasion at biopsy. Thirty-six of 117 lesions (31%) revealed invasive carcinoma at resection pathology. Invasive carcinoma was present more often when DCIS with possible invasion was diagnosed compared with pure DCIS (7/16 44% vs 29/101 29%, P = .36). No factor, including clinical indication, imaging abnormality, biopsy guidance method, sample number, or grade, was found to significantly affect the likelihood of underestimation for lesions diagnosed as DCIS vs DCIS with “possible invasion.” The likelihood of pure DCIS underestimation significantly increased when lesions were high grade compared with either intermediate or low grade (18/44 41% vs 9/44 21% vs 2/10 20%, P = .03). Conclusion For lesions biopsied by using a 14-gauge needle, there is a trend towards underestimation of the presence of invasive carcinoma when pathology reveals DCIS with possible invasion compared with pure DCIS. High-grade DCIS was significantly more likely to be underestimated.
Abstract Background Patients with Crohn disease (CD) often undergo both multislice computed tomography (MSCT) and small bowel follow-through (SBFT) for evaluation of their disease. We compared the ...findings on computed tomography (CT) and SBFT in patients with CD to determine whether MSCT can be the modality of choice in the evaluation of these patients. Methods We reviewed the CT and SBFT studies of 41 patients with CD. The findings were evaluated by three experienced abdominal imagers. Results There was no statistical difference in the detection of mural involvement of the small bowel. The CT showed additional involvement of the colon, mesenteric involvement, and extraenteric complications. Conclusion Multislice CT is a reliable modality in demonstrating enteric as well as extraenteric pathological findings in patients with CD. We suggest that MSCT can replace SBFT in the evaluation of patients with CD.
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